<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
      <ul>
        <li v-for="(item,index) in str"  :key="index">{{item}}</li>
      </ul>
      <button @click="str.push(str.shift())">走一走</button>
    
    </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
  <script>
    const app = new Vue({
        el:'#app',
        data:{
            str : ['帅哥','美女','程序员']
        }
    })
  </script>

    
</body>
</html>